diff --git a/mainnet/2024-11-18-increase-max-gas-limit/.env b/mainnet/2024-11-18-increase-max-gas-limit/.env
index d73a36cb..3df3f6a2 100644
--- a/mainnet/2024-11-18-increase-max-gas-limit/.env
+++ b/mainnet/2024-11-18-increase-max-gas-limit/.env
@@ -1,6 +1,6 @@
-BASE_CONTRACTS_COMMIT=ed36aac52a19bdad6dee09c59e7241fe3a194160
 OPTIMISM_REPO=https://github.com/ethereum-optimism/optimism.git
-OPTIMISM_PR_ID=pull/12879/head
+OPTIMISM_VERSION=op-contracts/v1.5.0
+OPTIMISM_CONTRACT_PATCH=patch/max-gas-limit.patch
 
 SAFE_ADDRESS=0x7bb41c3008b3f03fe483b28b8db90e19cf07595c
 PROXY_ADMIN_ADDRESS=0x0475cBCAebd9CE8AfA5025828d5b98DFb67E059E
diff --git a/mainnet/2024-11-18-increase-max-gas-limit/Makefile b/mainnet/2024-11-18-increase-max-gas-limit/Makefile
index 68e69d4e..004c5bc6 100644
--- a/mainnet/2024-11-18-increase-max-gas-limit/Makefile
+++ b/mainnet/2024-11-18-increase-max-gas-limit/Makefile
@@ -14,8 +14,9 @@ checkout-op-commit:
 	cd lib/optimism; \
 	git init; \
 	git remote add origin $(OPTIMISM_REPO); \
-	git fetch --depth=1 origin $(OPTIMISM_PR_ID):pr_branch; \
-	git switch pr_branch
+	git fetch --depth=1 origin tag $(OPTIMISM_VERSION) --no-tags; \
+	git checkout $(OPTIMISM_VERSION); \
+	git apply ../../$(OPTIMISM_CONTRACT_PATCH)
 
 
 .PHONY: deploy
diff --git a/mainnet/2024-11-18-increase-max-gas-limit/patch/max-gas-limit.patch b/mainnet/2024-11-18-increase-max-gas-limit/patch/max-gas-limit.patch
new file mode 100644
index 00000000..fc89fd73
--- /dev/null
+++ b/mainnet/2024-11-18-increase-max-gas-limit/patch/max-gas-limit.patch
@@ -0,0 +1,24 @@
+diff --git a/packages/contracts-bedrock/src/L1/SystemConfig.sol b/packages/contracts-bedrock/src/L1/SystemConfig.sol
+index 67a8353ae..ae72faf92 100644
+--- a/packages/contracts-bedrock/src/L1/SystemConfig.sol
++++ b/packages/contracts-bedrock/src/L1/SystemConfig.sol
+@@ -87,7 +87,7 @@ contract SystemConfig is OwnableUpgradeable, ISemver, IGasToken {
+     /// @notice The maximum gas limit that can be set for L2 blocks. This limit is used to enforce that the blocks
+     ///         on L2 are not too large to process and prove. Over time, this value can be increased as various
+     ///         optimizations and improvements are made to the system at large.
+-    uint64 internal constant MAX_GAS_LIMIT = 200_000_000;
++    uint64 internal constant MAX_GAS_LIMIT = 400_000_000;
+ 
+     /// @notice Fixed L2 gas overhead. Used as part of the L2 fee calculation.
+     uint256 public overhead;
+@@ -115,8 +115,8 @@ contract SystemConfig is OwnableUpgradeable, ISemver, IGasToken {
+     event ConfigUpdate(uint256 indexed version, UpdateType indexed updateType, bytes data);
+ 
+     /// @notice Semantic version.
+-    /// @custom:semver 2.2.0
+-    string public constant version = "2.2.0";
++    /// @custom:semver 2.2.0+max-gas-limit-400M
++    string public constant version = "2.2.0+max-gas-limit-400M";
+ 
+     /// @notice Constructs the SystemConfig contract. Cannot set
+     ///         the owner to `address(0)` due to the Ownable contract's